FOR IMMEDIATE RELEASE May 18, 2007 ADVANTEST CORPORATION (Toshio Maruyama, Representative Board Director, President and CEO) (Stock Code Number: 6857, TSE first section) (Ticker Symbol: ATE, NYSE) CONTACT: Hiroshi Nakamura (Executive Officer and Vice President, Corporate Affairs Group) Phone: +81-(0)3-3214-7500 Announcement with Respect to Share Repurchase on the Market and Completion of Repurchase (Pursuant to the Articles of Incorporation in accordance with Article 459, Paragraph 1 of the Company Law) Tokyo -May 18, 2007 - Advantest Corporation (the "Company") announced that the Company has repurchased shares on the market pursuant to the Articles of Incorporation in accordance with Article 459, Paragraph 1 of the Company Law under the terms set forth below, and has thereby completed the repurchase resolved at the meeting of its Board of Directors on April 25, 2007. 1. Period for share repurchase From May 7, 2007 to May 17, 2007 2. Aggregate number of shares repurchased 3,600,000 shares 3. Aggregate price of shares repurchased 19,111,279,000 yen 4. Method of repurchase Purchase on the market through the Tokyo Stock Exchange (For Reference) Contents of the resolution at the meeting of the Board of Directors on April 25, 2007 (1) Class of shares to be repurchased Common stock (2) Aggregate number of shares to be Up to 3.6 million shares repurchased (1.8% of total issued and outstanding shares) (3) Aggregate price of shares to be Up to 20 billion yen repurchased (4) Period for share repurchase From April 26, 2007 to June 20, 2007